Pencil and process for making the same.



C. A. SMITH.

l PENCIL AND vPROCESS lFOR MAKING THE SAME.

APPLICATION FILED DEC. I5. 1916.

Patented Apr. 10, 1917.

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To all lwhom t may concerter Be it known that I, CnAnLnsA. SMITH, a citizen ofthe United States, residing in the city of Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented an improved Pencil and Process j for Making the Same, of which ,the followfie ing is a specification.y

My improved pencil comprises a. dore, such as crayon, graphite or graphite composition, incased in a' body composed of substantially concentric layers or coils of fibrous material, such as wood liber paper, connected together by an adhesive so as to form a solid .holder for the marking material, the body or holder being of such character that it can be pared or turned by a knife to sharpen or point the pencil.

rihe pencil is made by my improved process, in which, by the preferred practice, a sheet of wood fiber paper is treated with an acid or acidulated solution, as by passing it through a dilute sulfuric acid bath or water treated with a small amount ofl sulfurie acid. The paper, after it has been thus treated, is dried or partially dried and then wound upon the graphite core, with an adhesive such as dextrin applied between the consecutive layers of the roll.

rlFhe pencils'may be subjected to pressurek while their bodies are still in formative condition, prior to the hardenin of the adhesive material, and may thus e pressed to a desired form, such as a hexagon in crosssection.

rlhe nally formed pencils -are dried either articially or by natural seasoning, when they are ready for the market.

rllhe treatment of the paper with the acid solution is for the purpose of weakening or breakin down the fiber more or less so that the bo y formed therefrom can be readily 1cut smoothly by a mite or sharpening too The pencil thus formed is inexpensive and not liable to the objectionable characteristics of pencils having sectional wood bodies, formed by gluing wood parts upon a graphite core, such wood parts having a common tendency to split. My improved pencil is, moreover, advantageous in view of the diculty of obtaining at a moderate `cost cedar or other woods suitable for making pencil bodies or cases.

specification of Letters Patent. Application med December 1t, 1916. Serial No. 137,072.

Patented dpr. titl, 12d t.

The accompanying drawings illustrate steps in the process and the product of my invention.

Figure 1` illustrates the treatment of the paper with a dilute acid; Fig. 2 illustrates an intermediate stage in the operation ot rolling the body; Fi 3 is an elevation ot a cylindrical form o the finished product;'

which is being formed by winding the sheet 3, to which is applied an adhesive 6 in proc- ,ess of winding sothat the successive coils or laminations are caused to adhere together.

ln Fig. 3 is shown a finished and sharpened pencil having a cylindrical body 7 composed of the adhering coils 'or laminations 8 and containing the graphite core 9,

the body being ot such character that it can l be readily shaved or pared to point the pencil.

ln Fig. 4f is shown a inished pencil having a body 10 of hexagonal cross-section, formed by pressure prior to the drying out of the adhesive, and composed ot the concentric coils or laminations 11 wound on the graphite core 12.

The product thus produced has a core and a case therefor both ot which are symmetrical with respect to the same axis or center, so that in turning a point the unsymmetrical and objectionable result is avoided which frequently obtains in turning points on pencils having wood cases which are frequently not symmetrical, with respect to the axis ot the lead or core. Further, the rolled paper body of my improved pencil cuts with a regularity and smoothness not found in pencils having wood bodies in which the grain, hardness and other qualities vary, frequently in the same pencil.

Having described my invention, I claim: 1. A pencil having a body composed ct adhering laminated coils of partially decomposed sheeted material.

2. A pencil having a body composed of sheeted wood ber paper having the bers titi core, the coils o tween them so as to form a solid partially decom osed .and wound upon a the paper being xed toplied be ody.

3. A pencil-having a body composed of wood ber paper havin the ber partially decomposed and adapte to be cut, said body comprlsing laminations permanently xed gether by an adhesive material a together.

f 4. The process of making pencils which consists in treating a sheet of fibrous material With a substance capable of breaking down the ber more or ess and winding the'sheet of treated 'material upon a core so as to forma body incasng the same.

5. Theprocess of making pencils which consists in treating a sheet of Wood ber paper with an acidulated solution adapted my name this 11th da)7 of to eect a condition whereby the paper is more readily cut, winding the sheet of treated paper upon a core soA as to form a body incasing the same, and applying an Vadhesive to the 'sheet m'process of winding so as to cause the wound coils to adhere together.

6. The process of making pencils which consists in treatin sheeted yvood ber with an acidulated sullric acid solution effecting a condition whereby the paper is more readily cut, drying or partially drying the treated paper, applying an adhesive thereto, and winding the paper with the adhesive thereon upony a core.

In testimony whereof I have hereunto set December, 1916.

CHARLES A. SMITH. 

